A spokesman for Ladbrokes has said the firm is "not prepared to offer long odds" on the HS2 line being subject to delays, alterations and cancellations.
The bookmaker is currently offering 4/5 that there will be delays when it comes to the opening of the service.
The government expects to complete the first phase of the high speed route from London to Birmingham by 2026, with the Manchester and Leeds extension being finished by 2033.
More top news
Karl Smith and Kevin Dugar are identical twins and can only be distinguished by their prison uniforms.
Jaseem Saeed scared staff at Paula Sherriff's constituency office last year, and is due to be sentenced on Monday.
Here are ten facts you may not know about the debate which could change America (and the world).